If you were an employer at Coleco Industries back in the beginning of 1982.
You could be lucky to be the very first to test Coleco's, at that time new product, namly
a
ColecoVision.

Coleco Inc. games division for development of Consoles and
games, had in 1982 a new "baby" ready for the market.

Coleco had their cartridge based Telstar Arcade with light gun and steering wheel,
but wanted to get stronger in the market for videogames.

Atari 2600 VCS had the strongest market, and was leading, no others like
Philips/Odyssey and Mattel could reach them.

So in 1979 began Eric Bromley at Coleco together with others to develop a
cartridge-based machine with an well known technic at the time.
Z80 as the CPU, TMS 9918/28/29 as the Graphic prossesor and SN76489 as the
Sound chip.
TMS 9918 for the first consoles in 1982, and already a year later in 1983
was it TMS 9928/29.

After around 3 years, late in 1981 was the environment around the circuit
board finished, and it was not without troubles.
A company near Chicago took care of it, and they decided along with Coleco not to include the Speed Roller in Coleco's Joypad.
It was a bad idea that would not work properly as intended.

In the beginning of 1982 was the device ready for a test.
Around 9 new games was developed for the machine, now named ColecoVision.
Cosmic Avenger was the first developed game, but Donkey Kong was a smash hit and was the pack in game.

Here is the prototyped box that is extremely rare to pick up today.

The prototyped box is purple while the official box is
gray.
The purple box was for selected employees who were interested in testing the new ColecoVision for Coleco
Industries before it could be sold in public.
The showed box above is recreated by ColecoVision.dk

There is for now only 2 existing purple
boxes.
Both was for sale on ebay, the first in March 2011, and the next one in May
2016.

The first one was sold for: $ 1.225 and this was with a complete system.
It was previously owned by Ex-Coleco
Employee Elizabeth W. Sydor, who passed away in January of 2010.Here are a video of the system.

And the second one was sold for $ 1.878
including a complete original prototyped ColecoVision with one game, namely
Venture.
It was owned by a former Coleco executive, Dexter Liu. He was a Director of
Product Development for Coleco from 1982-1986.
This ColecoVision is documentet with Serial # P 0000327

The main circuit board had in a short time, and we're talking months, several revisions.
10 times, has the circuit board been revised from
the first A to J.